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Lumia 640 Firmware Download for RM-1109 and How to Flash it

Stock firmware are mostly needed to either upgrade your Lumia 640 or flash the phone to correct certain software issues or malfunctions on the phone. Here on this page I have contained the download link for the complete Lumia 640, for RM-1109 latest flash files/firmware which can be used to flash your Lumia 640.
Please, note that you can only flash your Lumia phone using its correct RM-Number.

Example:
Windows Lumia 640 with RM-1091 is not the same as Windows Lumia 640 with RM-1090 or RM-1092 therefore, their flash files firmware cannot be used interchangeably.

Flashing a Lumia phone using wrong RM-Number may destroy the phone.

How to Download Latest Firmware and Flash Lumia 640 with RM-1090, RM-1091 or RM-1092

3. Move the downloaded firmware into a folder on your PC and name the folder exactly as RM-1109. This is to ensure that you are able to flash the phone using any Nokia Lumia Windows Phone service tools.

8. Almost immediately, Windows will detect your phone and the flashing sequence will commence. Your device will now be flashed. Once the flashing operation is complete, the device screen will flash green briefly.

9. Now, type in the command prompt:

thor2 -mode rnd -bootnormalmode

This command will reboot your phone and you may then disconnect the device from the PC and complete the proper setup from your end.